Electrical shot-firing machine for mines.



W. B. MOLARTY.

ELECTRICAL SHOT FIRING MACHINE FOR MINES APPLICATION FILED 0017, 1908.

Patented Mar. 30, 1909.

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mm 1i "My W. B. McLARTY.

ELECTRICAL SHOT FIRING MACHINE FOR MINES.

APPLIOATION FILED 00127. 1908.

Patented Mar. 30, 1909.

S SHEETSSHEET 2,

mmmm.

W, B, MGLARTY.

ELECTRICAL SHOT FIRING MACHINE FOR MINES.

APPLICATION FILED OUT. 7, 1908.

Patented Mar, 30, 190% 3 SHEETS-SHEET 3.

clear, and exact description of the invention,

"de-tziiled for igniting the fuse ol the charges of the apparatus. Fig. 3 is o detail sectional vlew of the mechanism for transmitting may be done from the outside of the niinezit circuit closing devices.

- UNETED -MCLARTY, OF \YlLliUli'lON, OlilnlllOiilA, ASSLUKOR Ul URL-HALF 'J'O JEFF l.

BOUOHER, Ol \VlLBURlON, OhLAll'OMA.

F 11 7 3" f" i i 4 WALTER B.

ELECTRICAL SHOT-FIRING Il FIAOHINE FOR IHUQNES Specification of Letters ln'tent.

Application filed October '7, 1508. Serial No. M6152 To all whom. it may concern.

Be it known that i, WALTER iiiolisnirr, E a citizen of the United States, residing at l \vilhurton, in the county of Letiiner end State of Oklahoma, have invented certain new and useful vli1iproveinents in Electrical Shohl iring iiiuchines for Mines; and I do hereby declare the following to he a lull,

l'lelerenre now being llil-ti to the details of the drawings by letter, A lcsigxittes asuitable frame in ul'iich the apparatus is adopted to be located and is nmde p1 (lei-ably air-tight to prevent dampness from a mine in which the apparatus is adopted to be lULZllC-(l l'rom rusting the circuit closer.

E designates-the source ol energy which may be u dynamo, batteries or curr .nt lrom an electric light plant, and i5 designates zi binding post connected to one pole of the source 0.1 electric energy, and it" the other pole. A suitable wire tr is connected to the binding post h zuid 2L wire ii to the binding post E and suitable switches l located in said wires ti. and The wires (1- nnit ii are adapted to puss down into the urine and the wire it is connected to o binding post li mounted upon suid cnsing A. while the wire G posses beyond the machine and is con nccted to one or more of the wires G, each of which adopted to be connected to at mine ehergeti. This feature of the invention is for the purpose of saving the running ol' o plurality of wires l or the machine from every explosive charge. A wire N is connected to tlie'binding post ii end else to 11v binding post W, which hitter is connected to a copper rin B of any suitable size or shape and which is mounted upon a non-conducting base 1). Mounted. in suitable bearings within said insulated base is n shalt C having a revoluble arm t, to which a circuit clOSCi' Y is electrically connected. Said circuit closer Y continuously in contact with the metallic ring B, and positioned at diil'ercnt intervals and in pairs upon the non conductor base are the series ol contacts Y and 'l which puss through apertures in said base and have binding posts l" rind 'f, to which. the wires and :rre respcc't-ivel v connected, the former ol mid uircs lil passing through and coniueted to ii binding post l1. Circuit closer. 12 arranged in pairs and electrically connected are mounted upon the revoluble urns and are niudc preleraibly ol spring steel so that, when the revoluble :irui actuntes the circuit closers over the contacts V and Ti", they will uuilu ood connections and insure the exploding oi the charges, and the circuit closer Y also made of the some rcsilient materiel so that it willrubti g htly upon the contact ring B at all times. The wire M is also connected to the charge S as is also the wire (l. Each of the explosive charges such as will enable others skilled in the art to which it zipper-thins to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form it part of this specification.

This invention relates to new and useful improvements in electrical shot firing zipperatus for mines and the object in vie is to provide it system whereby tiring of the shots dillerent intervals of time, and comprises mechanism so arranged that, after the wires have been connected to the charge, it will explode the shots at a predetermined moment Without the necessity of the operator being within the mine.

By the methods commonly employed at present of hand firing, one or more people are and'which frequently results in injury to lite and limb by the explosion occurring before the operators reach positions of safety.

The invention comprises an apparatus, which is provided with in series of circuit (losing means to conduct the current of electricity to dillcrent charges and, whenever acofituct is" made by the circuit closer, the charge Will be ix ilodednnd :it the some time cause a. signal to l)(} made outside of the mine to give notice so that the operator may know that the machine is in operation.

My invention is illustrated in the act-Jone l l application and in which: t, i Figure 1 is a rear elevation of the apparatus showing mechanism for closing the circuits through a series of mine charges and illusl tmting the circuits through which the curi l l l rents are passed. Fig. 2 is n. front elevation movement to the traveling circuit closer, and Fig. 4 is an enlarged detail "\LW of one set of binding post U on a motor or electric clock- I and causing motion to be inn to cause the arm (7 to rotate slowly, moves is adapted to be provided with an electrically primed fuse of any ordinary type. The wire M which is connected to the binding post V and is also electrically connected to the binding post L is adapted to communicate a current to the bell F. The other binding post F or the electric bell is connected through the medium of the wire R with the binding post E of the electric generator or source of energy.

Referring to Fig. 3 of the drawings will be seen the wires I and O, the former of which is electrically connected with the wire H at I one end and its other end connected to the work mechanism of any desired type, while the wire 0 connects the binding post Q, also upon said motor or electric clock mechanism, with the wire G. Q designates a gear wheelwhich is adapted to be actuated by the clock-work mechanism and is in mesh with a gear wheel Q which actuates a pinion Q in mesh with the gear wheel Q to which the 1 shait C is fixed and affording means for rotating the latter.

The operation or" my apparatus is as i'ol lows lhc various charges, as many as may he desired to he iired by my improved apparatus, are arranged in the places where the charges are desired to be exploded and, the necessary electrically primed fuses of any ordinary type being applied to the charges, the electrical connections are made shown and described. The switch being cutin, the current will pass tl'irough the wires H and G, thence through the wires l and O to the binding posts upon the motor or clock-work, setting the same in operation g -r1c l to the shaft (7 through thrintermeshing gears. Said gearing, which is arranged preferably over the insulating base 1), the circuit breaker Y being consta'rtly in contact with the .nietallic' ring B, while the circuitclosers Z will successively come in contact with the contacts V and T, thus causing a current to be passed through the connections shown to the various charges to be exploded.

it will thus be noted from the foregoing that, by the provision of an. electric apparatus as shown and described, a plurality of charges may be exploded one at a time, the movements of the apparatus being predetermined by the movement of the electric motor or clock actuating mechanism and without the necessity of the operator being within danger zone, a signal being given to warn the operator that the apparatus is in operation.

What I claim to be new is:

1. An electric shot firing apparatus for mines, comprisinga generator, a rotatable controller arm, circuit closers mounted upon said arm, means for operating the latter, a conductor ring against which one of said closers is constantly in contact, electrical connections between saidconductor ring and source of energy, a series of contact points against which the circuit closers upon said arm are adapted to contact at predetermined moments, electrical connections between said contact points, the source of energy and the charges to be fired, and an electric si nal in the circuit With said ring, as set fort i.

An electric shot firing apparatus for mines, comprising a generator, a rotatable controller arm, circuit closers mounted upon .said arm, means for operating the latter, a

conductor ring, an insulating base upon which the same is supported, a binding post extending through said base, electric circuit closers upon said arm, one of which is constantly in contact with said ring as the controller rotates, electrical connections between said binding post to the ring and the source of energy, contact points arranged in pairs upon said base and against which circuit closers upon said arm are adapted to contact at predetermined moments, wire connections between said contact points with the source of energy and the charges to be fired, and an electric bell in the circuit with said controller arm, as set forth.

In testimony whereof I hereunto aiiix my signature in the presence of two witnesses.

\VALTER B. MeLAR'lY. \Vitnesses J. M. IVEY, EUGENE RooNEY. 

